DOMImplementation::createDocumentType

(PHP 5, PHP 7)

DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object

Descrierea

public DOMImplementation::createDocumentType ( string $qualifiedName = null , string $publicId = null , string $systemId = null ) : DOMDocumentType

Creates an empty DOMDocumentType object. Entity declarations and notations are not made available. Entity reference expansions and default attribute additions do not occur.

Parametri

qualifiedName: The qualified name of the document type to create.
publicId: The external subset public identifier.
systemId: The external subset system identifier.

Valorile întoarse

A new DOMDocumentType node with its ownerDocument set to null.

Erori/Excepții

DOM_NAMESPACE_ERR: Raised if there is an error with the namespace, as determined by qualifiedName.

Această metodă poate fi apelată în mod static, dar va emite o eroare E_STRICT.

Exemple

Example #1 Creating a document with an attached DTD


<?php

// Creates an instance of the DOMImplementation class
$imp = new DOMImplementation;

// Creates a DOMDocumentType instance
$dtd = $imp->createDocumentType('graph', '', 'graph.dtd');

// Creates a DOMDocument instance
$dom = $imp->createDocument("", "", $dtd);

// Set other properties
$dom->encoding = 'UTF-8';
$dom->standalone = false;

// Create an empty element
$element = $dom->createElement('graph');

// Append the element
$dom->appendChild($element);

// Retrieve and print the document
echo $dom->saveXML();

?>

Exemplul de mai sus va afișa:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE graph SYSTEM "graph.dtd">
<graph/>

A se vedea și

DOMImplementation::createDocument() - Creates a DOMDocument object of the specified type with its document element

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User Contributed Notes 1 note

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until-all-bytes-are-free at example dot org ¶

13 years ago


I had problems to use a DTD from a file. It needed to be resolved relatively and it contained characters that made DomDocument failed to resolve the file.

Encoding and an absolute filename did not help much. So I used the data:// streamwrapper ( http://php.net/manual/en/wrappers.data.php ) as a work-around:

<?php

// relative or absolute filename
$path = '...';

// convert file contents into a filename
$data = file_get_contents($path);
$systemId = 'data://text/plain;base64,'.base64_encode($data);

// ...

// Creates a DOMDocumentType instance
$dtd = $aImp->createDocumentType('qualified name', '', $systemId);

?>

Works like a charm.

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